Your store would be more useful to me if the prices shown (and used for sorting) were sensitive to the Network filter. For example, the Samsung Galaxy S4 is "from $188". It is $188 for CDMA and $228 for GSM. If I filter Network to GSM, I would like the price and sorting to update to show $228. That would really make my shopping less frustrating.
shop: show/sort by relevant price when filtering on network